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Question

If 'X + Y' means 'X is the brother of Y', 'X $\times$ Y' means 'X is the father of Y' and 'X / Y' means 'X is the mother of Y', then which of the following would mean 'R is the son of S'?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
$S \times R + T$

Analyzing Blood Relation Codes

We are given the following relationship codes:

  • $X + Y$ means X is the brother of Y.
  • $X × Y$ means X is the father of Y.
  • $X / Y$ means X is the mother of Y.

We need to find the expression that means 'R is the son of S'. This implies that S is the parent of R (father or mother), and R is male.

Evaluating Options for 'R is the son of S'

Option 1: $S \times T \times R$

  • $S \times T$ means S is the father of T.
  • $T \times R$ means T is the father of R.
  • Combining these, S is the father of T, and T is the father of R. Therefore, S is the grandfather of R. This does not match 'R is the son of S'.

Option 2: $S / R / T$

  • $S / R$ means S is the mother of R. This part is consistent with S being a parent of R.
  • $R / T$ means R is the mother of T. This implies R is female.
  • Since R must be the 'son' (implying male) of S, R cannot be the mother of T. This option is incorrect.

Option 3: $S \times R + T$

  • $S \times R$ means S is the father of R. This fits the condition that S is a parent of R and implies R is male.
  • $R + T$ means R is the brother of T. This further confirms R is male.
  • Therefore, S is the father of R, which means 'R is the son of S'. This option is correct.

Option 4: $S + R \times T$

  • $S + R$ means S is the brother of R.
  • This means S and R are siblings. Neither is the parent of the other. This does not match 'R is the son of S'.

Conclusion

Based on the analysis, the expression $S \times R + T$ correctly represents the relationship 'R is the son of S'.

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Similar Questions

  1. In a certain code language,
    A + B means 'A is the husband of B',
    A − B means 'A is the brother of B',
    A x B means 'A is the sister of B' and
    A ÷ B means 'A is the daughter of B'.

    How is C related to J if 'C − E ÷ G + I x J'?
  2. Mo > No means that Mo is the daughter of No.  

    Mo # No means Mo is the father of No.

    Mo $ No means Mo is the mother of No. 

    Mo / No means Mo is the brother of No. 

    Based on the above, how is Po related to Ko in the given expression?  

    Po $ Qo # Ro / To > Ko

     

  3. 'R $ S' means that R is the brother of S.
    'R @ S' means R is the wife of S.
    'R # S' means R is the daughter of S.
    'R > S' means R is the father of S.
    Based on the above, which option indicates that D is the father-in-law of A?

  4. If A+B means A is the husband of B, A/B means A is the sister of B and A*B means A is the son of B. Which of the following shows M is the daughter of N?
  5. If L + M means ‘L is the son of M’, L - M means ‘L is the husband of M’, L × M means ‘L is the brother of M’ and L ÷ M means ‘L is the mother of M’, what does A × B ÷ C mean?
  6. 'A#B' means 'A is the brother of B', 'A^B' means 'A is the daughter of B', 'A*B' means 'A is the aunt of B' and 'A%B' means 'A is the mother of B'. If P*G%U#V^T#Z*V, then how is Z related to G?

  7. In a certain code language,
    A # B means ‘A is the mother of B’,
    A % B means ‘A is the brother of B’,
    A - B means ‘A is the wife of B’ and
    A @ B means ‘A is the father of B’.

    How is C related to U if ‘C - O @ M # B % U’?
  8. In a certain code language, 

    A @ B means 'A is the mother of B',

     A × B means 'A is the wife of B', 

    A + B means 'A is the brother of B' and 

    A ÷ B means 'A is the father of B'. 

    How is S related to H if 'S × D ÷ R @ Y + H'?

  9. In a certain code language, 

    A # B means 'A is the daughter of B',

     A @ B means 'A is the brother of B', 

    A ! B means 'A is the wife of B' and 

    A & B means 'A is the father of B'. 

    How is N related to V if 'N @ K # S & R ! V'?

  10. In a certain code language,

    A $ B means ‘A is the father of B’,

    A @ B means ‘A is the sister of B’,

    A # B means 'A is the wife of B' and

    A & B means ‘A is the brother of B’ .

    How is L related to T if 'L # I $ G @ H & T'?


Important Questions from Coded Blood Relation Problems

  1. If A @ B means A is the son of B, A # B means A is the husband of B and A * B means A is the daughter of B, then what does P @ Q * R # S mean? 

  2. If P $ Q means P is the husband of Q; P ! Q means P is the mother Q and P * Q means P is the daughter of Q, which of the following shows that Z is brother of W's wife, if Z is male?

  3. If P $ Q means P is the brother of Q; P ! Q means P is the mother Q and P * Q means P is the son of Q, which of the following shows that W is brother of Z?

  4. Read the following information carefully and answer the question given below:

    M * N means ‘ M is the sister of N’

    M % N means ‘ M is the father of N’

    M # N means ‘M is the mother of N’

    Which of the following option gives that, M is father of R?

  5. If ‘A + B’ means ‘A is the mother of B’, ‘A - B’ means ‘A is the father of B’, ‘A × B’ means ‘A is the brother of B’, ‘A & B’ means ‘A is the son of B’, then how is M related to K in the expression ‘N − M + T × L & G & K’?

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